In this work, the removal of cobalt has been precipitation separation in the form of cobalt oxalateby acid-soluble alkali leaching method. At first, the aluminum was selective removal by 5%sodium hydroxide, and then with the mixed solution of H2S04 and H2O2 to achieved the precipitation of cobalt oxalate. Theresults of this study can be considered in making decision which conditions of achieved precipitation of cobaltcan be efficiently applied in a real manufactory and recover valuable metals from waste lithiumion batteriesThe leaching rate of cobalt were evaluated by ultraviolet spectrophotometry.
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